knowledge adventure

First knowledge of JVM, first knowledge of demon spells1. Introduction to JVM First knowledge of JVM JVM is short for Java Virtual Machine (Java Virtual Machine). JVM is a specification used for computing devices. It is a fictitious computer, it is achieved by simulating various computer functions on the actual computer.A very important feature of Java is its

1. What is the. NET Framework, the so-called. NET Framework, is a platform that is designed to be programmed across operating systems. It contains many modules, such as Windows application artifacts, Web development modules, and different operating systems that support some of these modules according to their own characteristics. The NET framework is a programming platform that runs on virtual machines and is based on the common language runtime (Common Language Runtime) and supports the develop

Python journey 1.1 (first knowledge of python), python journey 1.1 first Knowledge 　　　　Some basic knowledge that must be mastered before learning python 1. Programming Language 2. python, C # JAVA 3. python: pypy cpython jpython 4. Execution Method Interpreter File Execution 5. Specify the interpreter Python xxx. py ./Xxx. py #! /Usr/bin/env python Ascii uni

WinForm development, form display and form value passing knowledge, winform knowledge In the past, I did not know much about WinForm display and passing values between forms.Recently, some WinForm development has been done, and the related knowledge used is organized as follows: A. display the form in WinFormYou can use either of the following methods to display

Cainiao journey-first knowledge of. NET, first knowledge of. net Pitfall. net has been around for more than two years.. Net System. net system also needs to understand, of course, this knowledge can also be found by reading materials, here mainly to learn about their own, and recently learn some of the taste of closed doors, now I want to share with you some idea

, universally applicable. (A subset of adaptive responses?) ）This setting is supported by all major browsers, including IE9. For those older browsers (mostly IE6, 7, 8), you need to use Css3-mediaqueries.js.[HTML] View plain copy-,Download the JS file: on the blog Oh! Modernlize (Browser compatible to Oh!) ）The advantage of float is that if the width is too small to fit two elements, the following elements will automatically scroll to the bottom of the preceding element without overflow (overflo

Learn PHP knowledge before you need to learn PHP 1. static website and dynamic website A) static website: Web sites that do not support data interaction (suffix: . html. htm) B) Dynamic website: Web sites that support data interaction, dynamic websites can be put on static web pages I. technology to implement dynamic Web sites 1.Asp. Asp 2.php. php 3.. net. aspx 4.Java. jsp 2. client and server side A) Client: The computer that the browser uses B) se

Basic jQuery knowledge points (below): Basic jQuery knowledge In actual development, jQuery is very practical. I have prepared some basic knowledge points in the previous article. This article is a supplement and extension to the above.1. Operation of form values 1 // obtain the text box value 2 // txt. value3 var val = $ ("# txt "). val (); // No parameter indic

Summary of common minor knowledge and minor knowledge in processesWindows Process application tips Use priority Computer Knowledge Computer skills summarized by experts throughout their life#1 A computer skill Summary by a master: The following skills are commonly used, but not everyone knows. Please select only the content you are interested in for selective vie

[MongoDB] MongoDB's missing knowledge points and mongodb's missing knowledge points Up to now, I have read three mongodb books. Today, when I read the MongoDB authoritative guide by Kristina Chodorow in the United States, I found that there are still many omissions in my knowledge. Now I want to make a supplement;I. Deletion speed Deleting a document is usually

Summary of basic JavaScript knowledge and common methods, basic javascript knowledge JAVASCRIPT is an indispensable part of AJAX technology. Therefore, it is most important to learn JAVASCRIPT well if you want to learn AJAX well and the popular AJAX framework. I. Basic Knowledge: 1.doc ument. write (""); Output statement2. Comments in JS are //3. The traditional

Important CSS knowledge points (1) and css knowledge points 1. Box Model When CSS processes webpage content, it puts every element in a box, the so-called box model. The box model consists of four parts: content, padding, border, and margin) The content of the entire box model is displayed. How can this problem be solved? Simple. If you think it is simple, it's a big mistake !! There is a pitfall in the bo

You should update the common Java Knowledge Library [reprinted] and java knowledge reprinted In the eyes of many people, Java is already an old language, but it does not prevent the Java World from moving forward. If you have left Java, traveled to other worlds, or struggled with the legacy code every day, you may have to raise your head to see new things in old Java. Guava Guava[Gw runtime: v runtime].

Basic knowledge of IOS development-fragment 30, basic knowledge of ios-Fragment 1: knowledge points of ALAssetsLibrary in ios album operations The a ALAssetsLibrary instance provides us with the function of getting pictures and videos in an album (photo app. In ios8 photos framework, ALAssetsLibrary is replaced. When using ALAssetsLibrary, We need to declare its

First knowledge of Android, first knowledge of android It has been a year since I created my blog and I feel quite ashamed to use it all the time. Recently, I felt an impulse to write a blog. what's even more terrible is that this impulse seems more intense than the flood in my body. As a result, this blog was born quietly. Not to mention nonsense, go to the topic-get started with Android. This blog begins

Basic knowledge of IOS development-fragment 21, basic knowledge of ios-Fragment 1: [UIScreen mainScreen]. scale knowledge point When the screen is 640x940, [[UIScreen mainScreen] scale] = 2.0 when the screen is 320xlarge, [[UIScreen mainScreen] scale] = 1.0 2: How to correctly draw a line of 1 pixel # Define SINGLE_LINE_WIDTH (1/[UIScreen mainScreen]. scale) #

Little bootstrap knowledge, little bootstrap knowledge At the end of the year, there was no project to do. I sorted out the bootstrap knowledge recently used by my website. I. Import bootstrap styles and scripts Ii. navigation bar1. navbar classAdd class. Navbar-fixed-top: indicates to pin the navigation bar to the top of the page. 2.. brand class: displayed

visitor pattern, you put as much of the object-browsing logic in the visitor class as possible, rather than in its subclasses. The visitor pattern can access member classes belonging to different hierarchical structures across hierarchical structures of several classes. Off Topic: Tao Nature, born in nature, hidden in nature, so-called pattern is experience and experience. All things, comprehend by analogy, as the text of the design pattern of the preacher of the concept, the fact

Tags: test thinkphp blog pre span div alt condition Knowledge Code abuse me times, I to code such as first love ~ Problem: Querying a field app_date whether the data is null, the normal way we do this is: $map Array (' eq ', ' null '); $data M ("Info") , Field ("*"), where ($map), select () Use echo M ("Info")->getlastsql (); Print SQL statements as follows: SELECT ' id ', ' name ', ' create_time ', ' app_data ' from ' info ' WHERE ' app_data ' = ' N

processWindows: Single-user multi-process (early windows)UNIX: Multi-user process8, why should have an operating system?1, encapsulating all the hardware interface, make users more convenient to use2, for all resources within the computer, reasonable scheduling and distribution9, Multi-process moduleMultiprocessingProcess10, process-related knowledge, operation1) synchronous, asynchronous, blocking, non-blockingSynchronization: Refers to sending a re